21188540

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{22541}}^1$

素因数の和:22597

約数の個数: 24

約数和(自身を含む): 45444672

約数和(自身を除く): 24256132

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 22541, 45082, 90164, 112705, 225410, 450820, 1059427, 2118854, 4237708, 5297135, 10594270, 21188540]

約数ペア:

[(1, 21188540), (2, 10594270), (4, 5297135), (5, 4237708), (10, 2118854), (20, 1059427), (47, 450820), (94, 225410), (188, 112705), (235, 90164), (470, 45082), (940, 22541)]